2.11BSD#431 - /usr/man/cat3/isatty.0

TTYNAME(3)	    UNIX Programmer's Manual	       TTYNAME(3)


NAME
     ttyname, isatty, ttyslot - find name of a terminal

SYNOPSIS
     char *ttyname(filedes)

     isatty(filedes)

     ttyslot()

DESCRIPTION
     Ttyname returns a pointer to the null-terminated path name
     of the terminal device associated with file descriptor
     filedes (this is a system file descriptor and has nothing to
     do with the standard I/O FILE typedef).

     Isatty returns 1 if filedes is associated with a terminal
     device, 0 otherwise.

     Ttyslot returns the number of the entry in the ttys(5) file
     for the control terminal of the current process.

FILES
     /dev/*
     /etc/ttys

SEE ALSO
     ioctl(2), ttys(5)

DIAGNOSTICS
     Ttyname returns a null pointer (0) if filedes does not
     describe a terminal device in directory `/dev'.

     Ttyslot returns 0 if `/etc/ttys' is inaccessible or if it
     cannot determine the control terminal.

BUGS
     The return value points to static data whose content is
     overwritten by each call.


Printed 11/26/99	  May 15, 1985				1